The World’s Largest Y-DNA Haplotree
FamilyTreeDNA’s Y-DNA haplotree includes over 91,000 branches and 761,000 variants — the most detailed paternal ancestry map in the world. Each month, we update this post with the latest growth stats, haplogroup insights, and tools to help you explore your place in history.
A Genealogist’s Guide to Understanding Your FamilyTreeDNA Autosomal Matches
Your Family Finder DNA match list is full of clues—if you know how to use it. This guide helps you make sense of your autosomal DNA results.
Ancient Connections of the Maternal Kind
Your maternal line holds secrets from across centuries and continents. See how mtDNA connects modern testers to ancient individuals around the world.
25 Years of Genetic Genealogy: A Conversation with Bennett Greenspan
What started as a question about one family name became the foundation of modern genetic genealogy. Here’s how Bennett Greenspan made it happen.
Voices from the Beginning: Early Group Project Administrators Reflect on 25 Years of FamilyTreeDNA
Two of FamilyTreeDNA’s earliest Group Project Administrators reflect on 25 years of discovery, innovation, and connection through genetic genealogy.
Understanding Y-DNA Haplogroups in Family Finder™ Results
Learn how Family Finder uses SNPs to assign Y-DNA haplogroups, what they mean for your paternal ancestry, and how to refine results with tools like Discover™ and Big Y-700.
DASTs, CASTs, and the Quest to Reclaim Lost Irish Clans: “Gene-Ealogy” and the New Era of Irish Surname, Clan, and Kindred Research
Explore how robust DNA and surname tree methods are helping researchers move beyond dominant Irish genealogy narratives to uncover lost clans like Ó Maol Phádraig of Bréifne.
2025 FamilyTreeDNA Discount Codes
Register online for free to attend the virtual conference, and be sure to visit our virtual booth!
RootsTech 2025 Virtual: Discover, Connect, and Grow-Virtually
RootsTech 2025 is just a week away! Whether you're a first-time attendee or a returning researcher, our virtual guide will help you navigate sessions, connect with experts, and make the most of your genealogy journey.
Updated mtDNA Haplotree: 35,000 New Branches for Genealogy Research
FamilyTreeDNA’s mtDNA Tree of Humankind has expanded with 35,000 new branches, offering more detailed maternal ancestry insights than ever before. Learn how this update enhances your mtDNA results, genealogy research, and our understanding of human history.